Photographic-printing device.



ABERT.

PHOTOGRAPEIG PRINTING DEVICE.

APPLIOATIQN FILED 2213.23, 1912.

l 2 SHEETS-MEET 1.

w@ J y 1n# H. ABERT.

PHOTOGRAPHIC PRINTING DEVICE.

APPLICATION FILED 11211.23, 1912.

1,052,876. Patented 1161.111913.

2 SHBETS-SHEET 2.

rarer menten.

HAMILTON-ABER@ 0F NEW YORK, N. Y.

YSpecification of Letters Patent.

rnoiooaarnonmrmo DEVICE.

Patented Feb. il, llt-D13.

Application led February 23, 1912. Serial No. 679,221.

To ZZ whom it may concern.'

Be it known that I, HAMILTON Annate, a citizen of the United States, residing in the city of New York, borough of Manhattan, county and State of New York, have invented Aa certain new and useful Photographic-Printing Device, of which the following is a specification. n

This invention is a photographic printing device, and the object ot the invention is to enable the printing operation to be carried out in such manner as to produce uniform prints, t'. c., prints which have been equally exposed at all parts thereof during the printing operation.

`With this object in view, the invention embodies a printing` chamber, means for illuminating it, and means whereby the illuminating means is automatically lighted after the introduction of the printing frame into the chamber and extinguished upon the withdrawal of the printing frame from said chamber.

In a preferred embodiment of the invention, the illuminating means is an incandescent lamp, in circuiti with which is a switch positioned in the path of the printing frame and operable thereby, said printing frame operating to shut off the current, thereby extinguishing the light, when starting to insert said printing frame into the chamber, and to switch on the current, thereby illuminating the lamp, upon the complete insertion of the printing frame into the chamber. `When the printing frame is withdrawn from the chamber, the reverse operation takes place; 2. e., upon starting to withdraw the printing frame 'from the chamber the light is extinguished and remains eX- tinguished until after the printing frame is withdrawn from the chamber.

In the accompanying drawings', I have illustrated ditferent practical embodiments of the invention, but the constructions disclosed therein are to be understood as illust-rative, only, and not as defining the limits of the invention. l

Figure l is a vertical section through a device embodying this invention adapted forl printing photographic negatives or the like. F ig. 2 is a horizontal section on the line 2v2 ot Fig. l, illustrating the operation of inserting a printing frame into the with two forms ot' my new printing d -it becomes necessaryto slightly modify or chamber ot the printing device. `Fig. 3 is a'vertical cross section on the line 3-3 o1 Fig. l looking in the direction of the arrow. Fig. L is a detail vie-w in plan, partly in horizont-al section, illustrating another embodiment of the switch mechanism by which the lamp is controlled automatically upon the insertion or withdrawal 'of a printing frame. Fig. 5 is a view, .similar to Fig. 4, illustrating another embodiment of the switch mechanism.

The printing device embodies a casing A. forming a printing chamber one practical embodiment ot which casing will be hereinafter described in detail. rlhe casing is of suitable dimensions to contain a print-- inc frame of al predetermined size, and within the chamber A is positioned means for illuminating said chamber. While various forms of illuminating means may be ernployed, l have shown said illuminating means in the form of an incandescent electric lamp B, the latter being positioned within the upper part of the chamber and at such a distance above `the printing trame that there will be a proper dispersion oit the rays of light. The incandescent lamp is shown as having a male threaded stem b which is adapted to be screwed into a female threaded socket b" et a. Fixture plate B. Suitable provision is made 'for the electrical connection of the incandescent filament with a lighting circuit when the. lamp is screwed into the socket, but as these details are well known to those skilled in the art, l have not considered it necessary to particularly describe or illustrate the electrical connections.

Casing A is provided at its lower partand in one of its walls with an opening o for the introduction or withdrawal of a printing frame C. Said printing trame is constructed in the ordinary or well known manner so that it will embody means for receiving a photographic negative, the sensitized paper upon which the print is to be made.` and asuitable back tor clamping the negative and the vprint paper in predetermined relation. As the printing trame is well known Ain the art,iit has not been considered necessary to illustrate the saine in. detail. ,To adapt the printing trame-for use evice,

. path of a printing frame for contact with I ings. VSwitch mechanism D represented in Fig. 2 embodies a spring composed, preferably, of plate metal, one end of which,v is fastened at d to the casing. Said switch spring is provided with a bend ci near its tree end, said bend d being normally@ in the one edge thereof. The i'ree end ot switch spring D is adapted tor 'engagement with a contact e, the latter being secured at c so that the contact is normally in the path of the tree end of the lswitch spring. rthe switch' mechanism including the spring and the contact i's electrically insulated from metallic contact with the casing by a layer of rubber, liber, or other insulating material E. The circuit connections forthe lamp and the switch mechanism of Fig. 2 are as tollows :4A feed wire f leads directly to the socket and the filament of the lamp; a return wire f is connected with the'sorew or other device e by which contact e is fixed to the insulating layer l5 and a branch conduc. tor leads from the socket and lamp lilament to the screw d by which the switch spring l) is fixed to theinsulation E. Nith the form oi switch shown, traine C is provided in one of its side edges with a notch c, the latter occupying such position that upon the insertion of the printing trame to its operative position within the printing chamber, spring l) will move in a direction to cause bend d to enter said notch c, thus closing the electric circuit, and admitting current to lamp B.

The operation of the device as thus far dcscribed is as foilowsz-sl/hen the printing` tramo not inserted into the casing, switch spring D is 1n electrical engagement with Contact c, and current then [lows through feed wire f, the lamp filament, branch conductor ff, switch spring D, contact e, and return wire Current is thus admitted to the lamp for the purpose of illuminating the printing chamber. When the printing iframe is to be inserted, its end is thrust through opening a, whereupon said end el the -trame engages with bend JZ and presses switch spring l) away troni contact c, as shown in full lines in Fig. whereby the circuit is broken and the light. is extinguished when ,the frame is positioned for insertion into the casing. The printing frame is now shoved into position, the lamp being extinguished during such operation, and the engagement of bend d with the edge ofv the printing `frame holding the switch spring in a non-operative position. `When the printing frame 'is fully inserted into the print-in chamber, notch @comes opposite to the ben of the switch spring, the inherent elasticity of which operates to return the switch spring to a normal position, whereby the circuit is closed by the switch spring engaging with contact e, the bend d" of said switch spring fitting into notch c of the printing frame. The lamp thus operates to illuminate thev printing chamber', for the purpose of securing photographic print of the negative contained in the frame, all parts ofthe negative and the sensitized paper being equally exposed to thel light of the lamp. After a suitable exposure of the photo graphic print, the operator withdraws frame C from printing chamber A. At the beginning of the operation of withdrawing the printing frame, notch c is moved away from the bend cl in the switch spring, and said bend engages with the edge of the printing frame, a result o'l which the switch D is moved away from contact c, for the purpose of breaking the circuit and extinguishing the lamp. During the operation of withdrawing the printing tramp, the circuit remains open andthe lamp is extinguished, but just as the frame leaves the chamber, theV bend d of the switch spring cloars'the end'portion of the printing traine, whereupon the spring D again engages with contact e, for the purpose of closing the cir cuit and lighting thelamp to illuminate the chamber.

The switch mechanism illustrated in Fig. d is similar to. the embodiment of the invention shown in Fig. 2, but in lieu of the notch c in the printing frame C, the printing frame C of Fig. 4f is provided with a con'- tact c. This contact is positioned on printing trame C', so as to span the space between contact e and the' bend d of switch spring D, when the printing frame is in a position fully inserted Awithin the printing chamber. ln this form of switch mechanism the circuit is closed when the printing traine is not in position, and, accordingly, the lamp is lighted and the chamber illuminated. Upon placing the printing frame in position for inserting it through openings a of the casing, thev end portion of the frame engages with bend d', s o as to move the switch to an open position. The frame is now inserted, the lamp being extinguished during such operation, but when the print-ing trame reaches its full inserted position, the bend al of the spring is still -in engagement with the frame so that theV end of spring D will not .bend d thereof remains in engagement with the edge of the frame until said frame shall have been withdrawn a. suiiicient distance D for said bend d to clear the end of the frame,

whereupon the switch returns automatically to a closed position, for the purpose of again admitting current to the lamp.

In Fig. 5 of the drawings there is shown a double switch mechanism adapted for use in connection with an ordinary printing frame C2, the latter bein(T minus either the notch c of Fig. 2, or the frame contact c of Fig. 4. One element of the double switch mechanism is a switch spring F positioned near the entrancel to the printing chamber, and a second element of the switch mechanism is a'switch sprintf F positioned adjacent to that end of the printing chamber which is to be occupied by an end portion of printing frame C2 when Vsaid frame is fully inserted into the chamber or casing A. Spring switch F is similar to the spring switches disclosed in Figs. 2 and 4, that is to say, one end of switch F is fastened at g to insulation Gr; the free end of the spring is provided with the bend g', and the eX- tremity of the spring is adapted for engagement with a contact it, the latter being attached at It .to insulation G. The other switch spring F is fastened at t' to insulation I. The e'lectricalconnections for the,

double switch mechanism are as follows: Feed wire j runs directly7 to the filament vof incandescent lamp B. The return wire y" is connected at z' to switch spring F from Contact I extends a conductor 7c which is attached to contact ,71; from the iiXed point j of switch spring F leads a conductor lv.

which is branched on to the return' wire j', and from the lama ilament leads a conductor la? `which`is lbranched on to theconductor between contact I and contact z.

The operation of the device thus described, and shown in Fig. 5, is as follows :-W hen printing frame C2 is not in the printing chamber, switch F is closed and switch F is 1open, whereupon current flows through feed wire to the filament of the lamp B, through iconductor 7a2 to contact t, switch spring F and conductor 7c3, thence to return wire j, said conductor 7c3 being attached at one end to the fixed point g of switch spring F, and at itsother end to said return wire j. Current thus flows through the switch F and lamp B, for the purpose of lighting the lamp and illuminating the printing chamber. The sensitized paper and negative having been positioned within t-he printing frame, and said frame placed in a position to enter opening a in the casing A, the forward end of the printing frame engages with bend g of switch F, thereby pressing said switch F away from contact L, and breaking the circuit, the result of which is to extinguish the lamp B during the operation of inserting the printing frame into the printing chamber. As soon as the printf ing frame is, fully-inserted into chamber, theforward endof said printing frame engages with the free end of switch spring F, pressing the bend c" of said spring into engagement with contact I', whereupon the current flows as follows z--through feed wire j to the lamp filament, conductor 702' through conductor 7c to contact 1, switch spring F and through return wire j. The

lamp is thus lighted and illuminates the chamber so that'the lightis utilized in securing the desired print through the negative upon the sensitized paper held within frame C2. When the work of print-ing the sensitized paper shall have been completed, the operator removes the frame from casing A. As the frame begins to move, lswitch spring F is released, and the circuit through the lamp is broken, thereby extinguishing the light. The light is out of service during the operation of withdrawing the frame from the casing, but as soon` as the frame clears the bend g of switch spring F, said spring returns to its normal closed position, and engages contact z, wliereuponthe current is directed through the lamp, and the latter is lighted foi` illuminating the chamloer.

In the practical form of casing A, shown in Figs. l, 2 and 3, it is preferred to construct the casing in knock down form, whereby all the parts'are foldable within a small space. AThe casing is shown as consisting of a base A2, side panels H, H', an

end panel J, an end frame K, and a top L.

Said panels H, H are hinged at their lower ends, as at m to the base A' whereby one panel, as H, may be folded within said base,

vand thereafter panel H may be folded upon panel H. The socket fixture Bf is attached to the panel H so to be foldable therewith, although lamp B should be unscrewed from the socket prior to folding the panels within the base.. At their upper ends, the panels H, H are provided with guide tianges u, with which are adapted to interlock other flanges 0 provided on t-he edge port-ions of top L, whereby the-top L is adapted to be supported in position by said panels H, H, and said top coperates with said side panels tov retain them in their unfolded operative positions. The side panels H, H are provided with longitudinal grooved beads p near their' respective edges, as shownin Fia. 2, and with the grooves of-said beads interlock y the ribs t] on flanges g provided on the end panel J' and the frame' K. As shown in F ig. 2, end panel J is provided `at its side edges with flanges g', and these tianges are formed with ribs g, whereby the panel il may be slid into position for the flanges g to overlap the side panels H, H', and for the ribs f/ to enter the grooves ot beads p, thus locking end panel J to side panels H, H. ln asimilar manner frame K is provided at its respective side edges with flanges g, and these flanges are provided with ribs q, so that frame K may be slid into position for the iiangesg to overlap side panels H, H', whereuponthe ribs g will slide into the grooves ot beads p, thus locking frame K to the side panels. The several panels and the top are, thus separably connected together in a way to retain themselves in position, and to provide for readj,7 disengagement so that the panels can be folded into the base A, but when the parts are adjusted into their operative positions, the panels and the top are locked together by lighttight joints. Frame K serves the purpose,

' mainly, of an end panel, similar to panel J,

but said frame li is provided with a pane er light of colored glass C, preferably a ruby glass, which is helddetachably in position by suitable guideways s attached to the outside of frame K, as shown in Figs. 2 and The printing device is adapted to serve the purposes of a ruby light in a darkened room. for the reason that the rays of light from lamp B Aare adapted to pass through the colored glass O, and to be so modified that the light will not injuriously effect the sensitized paper which is used in the printing operations: lt will be understood, accordingly, that the apparatus of this invention may be used in a manner to illuminate the room in which the printing operation is carried on, thereby affording sutlicient light for the operator to change'A the negatives and the printing paper in the printing trames without injury to the sensitized paper, and to insert and remove the frame, the ruby light affording suiiicient illumination to carry on these operations with ease and facility.

llaving thus `fully described the invention, what l claim as new, and desire to secure by 1 Letters Patent is 1. in a })l1otogra]' hic printing device, the combination ot a printing chamber one Well of which is composed of translucent material, illuminating means positioned within said chamber, and means operable by a printing traine for extinguishing said illuminating means during' the acts of inserting and withdrawing said printing iframe, said. illuminating means being lighted when the the like, asingle source et light insalate printing frame is Wholly 'Withdrawn from the printing chamber, whereby a room or apartment is adapted to be illuminated by rays of light from the illuminating means passing through the translucent material.

2. ln a photographic printing device, the combination of a printing chamber one wall of which is composed of a colored glass, or aositioned 'Within said chamber, and a contro ler operable by a printing frame for extinguishing the single source of -light during the acts of inserting and withdrawing the printing frame, said centroller operating to maintain the source of light in service after the printing frame is Withdrawn from said chamber and also during the period that said printing frame is at rest Within the said chamber, whereby upon removal of the printing frame the source of light. will illuminate a room or a artinent b i the ra of li 'ht i ing through the colored glass.

ln a photographic printing device, the combination of a printing chamber one ot the walls of Which is provided With a printing frame slot the area o-Which slightly' ei;- ceeds the cross sectional area of the printing traine adapted to he moved therethrough, illuminating means positioned within said chamber, a printing frame insertible and withdrawable through said slot, and a. controller coperating with said printing frame. for extinguishing said illuminating means during the acts ot inserting and withdrawing the printing frame, said controller acting to maint-ain the illuminating means in service when the printing frame is withdrawn and also during the periodmthat the printing trame at rest within said chamber.

Ll. ln a photographic printing device, the combination of a printing chamber one o the walls ot' which is composed of a colored glass, a. source ot light positioned within said chamber, a printing traine insertible into and Withdrawable from said chamber, and a controller switch separated from the printing trarne and positioned within said chamber in the path of said printingI traine, said' controller switch cooperating with a menfiber for maintaining the source of light in .service when the printing1 frame is removed from said chamber and also during' the period that said printing trame is at rest therein, said controller switch operating to extinguish the source of light during the acts of inserting and withdrawing the prin ting iframe.

5. ln a photographic,printing device, the combination of a printing chamber one wall oi which is composed of a colored glass, a source of light positioned within said charnber, a controller positioned Within said chamber and connected with said source ot light, and a printing frame insertible into and Withdrawable from' said printing chamber,

noteer@ V said controller and the printing frame cooperating with each other to extinguish the light during the operations of inserting and withdrawing the printing,r frame, and said controller acting independently or" the'printing frame when the latter is withdrawn for -maintaining Vthe source of light in service.

6. In a photographic printing device, a

' printing chamber, an incandescent electric lamp therein, and a switch mechanism in eluded in circuit with said lamp and positioned in the path'oi'' a printing frame, said switch mechanism being operable by the printing frame -so that the light is extin guished on starting to introduce the print- .ing frame intosaid chamber and illuminated upon the ,complete introduction of the printing frame within the chamber.

7. In a photographic printing device., 'a printing chamber, an incandescent electric lamp therein, andaswitch-mechanism inveluded in circuit with said lamp and positioned in the` path of a plate holder, said switch mechanism being' operable by the plate holder so that the lightis extinguished on starting to introduce the plate holder into said chamber and illuminated upoii the completeintroduction of the plate holdbr within the chamber', saidl 'switch mechanism being?l operated, also, by the plate holder. to extinguish the light upon starting to withdraw the plate holderiirom the'chember andvto illuminate the lamp upon the complete withdrawal of said plate holder from the chainber.

8. In a photographic printingV device, 'a casing` provided with an opening', means for illuminating,r said casing, switch mechanism for controlling said illuminating means, and

a printing frame insertible and withdrawable through said opening', said printing frame operating the switch mechanism to extinguish the light during'such insertion and withdrawahsaidv frame having' means whereby the switch mechanism operates to light the' illuminating means when said *ralityof upper panels foldable relatively to ,for controlling said illumina-ting means, said;l

,the withdrawal of the printing frame froml the printing chamber and during the lperiodthat said printingrame isliat' rest within said printing chamber, said' swih mech nisn operating also to extingui'shfthe illu-Y minating means during thefoperations of inserting and withdrawing the printing;l frame.

10. ln a photographic .printingfdevicd a casing' embodying a base section and 'st-plu the base section, said base section being` pro;v vided with an opening for the' introductionk and withdrawal of a plate holder, combined with means for illuminatingthe casing', and* a switch mechanism for controlling said illu 75 minating means. 4 11. In a photographic printing' device, a casing provided with a colored transparent pane, illuminating means positioned with saidV casing', `and .means operable byA thefi sertion and withdrawal of a printing frame means operating to maintain the illuminat-` ingl means in service upon the withdrawalfof lthe printing,r frame from the casing'. In testimony whereofl have signed my name to this specificationin the presence of two subscribing witnesses.

' HAB'HLTONII'ABERT.'

lVitnesses:

J. F. MoTHnnsHnAn".

photographic printing device, 'a-` l ly;` 

